/home/marsyas/marsyas/src/marsyas/MFCC.h

/*
** Copyright (C) 1998-2006 George Tzanetakis <gtzan@cs.uvic.ca>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#ifndef MARSYAS_MFCC_H
#define MARSYAS_MFCC_H

#include "MarSystem.h"


namespace Marsyas
{
class MFCC: public MarSystem
{
private:

    void addControls();

    void myUpdate(MarControlPtr sender);

    mrs_real lowestFrequency_;
    mrs_natural linearFilters_;
    mrs_real linearSpacing_;
    mrs_natural logFilters_;
    mrs_real logSpacing_;
    mrs_natural totalFilters_;

    mrs_natural fftSize_, pfftSize_;
    mrs_natural samplingRate_, psamplingRate_;


    mrs_natural cepstralCoefs_;
    mrs_natural pcepstralCoefs_;
    static const int cepstralCoefs_default = 13;

    MarControlPtr ctrl_cepstralCoefs_;

    realvec freqs_;
    realvec lower_;
    realvec center_;
    realvec upper_;
    realvec triangle_heights_;

    realvec fftFreqs_;
    realvec mfccFilterWeights_;
    realvec mfccDCT_;
    realvec earMagnitude_;
    realvec fmagnitude_;

    // NEIL's filter weight speedup
    int* mfcc_offsets_;

    bool init_;

public:

    MFCC(std::string name);
    MFCC(const MFCC& a);
    ~MFCC();
    MarSystem* clone() const;

    void myProcess(realvec& in, realvec& out);
};

}//namespace Marsyas

#endif

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